fix npm version (#49)

Author: jdewinne

.github/workflows/release.yml

@@ -33,7 +33,12 @@ jobs:
           node-version-file: 'package.json'
       - name: Build
         run: make build
-      - run: npm version --no-commit-hooks --no-git-tag-version ${{ github.ref_name }}
+      - name: set outputs
+        id: vars
+        run: |
+          npm_version=${{ github.ref_name }}
+          echo "npm_version=${npm_version#v}" >> "$GITHUB_OUTPUT"
+      - run: npm version --no-commit-hooks --no-git-tag-version ${{ steps.vars.outputs.npm_version }}
       - run: make publish
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}